Virtual Texturing Feedback

[DamirH]

@jgp80

I’d say they are NOT using D3D11 native virtual textures (tiled resources) because:

• The version of D3D11 included in the engine does not support D3D 11.2.
• There is no trace of the D3D11 Tile resouce API calls in the code.
• In a video, they mentioned that this were introducing a performance cost (extra texture sample) for an extra indirection (perhaps to map UVs to the actual textures).

So, if this is the case I’d ask: why aren’t they using native tiled resoruces for this?? (maybe to develop a unified virtual texturing solution once at a higher level, not depending on the underlaying graphcis API?)

Hopew or someone else at Epic can give us some answers

This is usually how they worked. They implemented their own SharedRef and SharedPtr architecture as well for example to be able to maintain cross-platform compatibility. Can’t say if this why they 've done it with VTs but that’s my guess.